This is not meant as an insult, but needs to be said as forcefully as possible:
DO NOT ASSUME YOUR APP WILL WORK ON IOS BECAUSE IT WORKS ON ANDROID.
You should go through all of the same testing procedures you did on Android to confirm that it does indeed function identically on both OSes. This is from experience, as well as from established development debugging strategies.
If you plan on doing a low/minimal amount of testing on iOS and releasing, you need to be ready to fix and push an update before you get a large amount of bad reviews.
Of course it’s possible that you won’t encounter any issues, but this is more the exception rather than the rule. Clearly you should follow your own development strategy, but the above should be observed whenever possible.